Perfluoro(3-methyl-2-butanone) (C5F10O) is a new type environmentally friendly insulating and arc quenching gas that used for sustainable alternative sulfur hexafluoride (SF6). As insulating and arc quenching gas, perfluoro(3-methyl-2-butanone) has many key features and benefits, such as 0 ODP and very low GWP, excellent dielectric and arc quenching properties, compatible with equipment components, non-flammable, low toxicity, etc..